Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Histological Change of Uterus Endometrium and Expression of the Eggshell-related Genes according to Hen Age

닭의 산란연령에 따른 자궁내막조직의 변화 및 난각 관련 유전자의 발현양상

  • Park, Ji Ae (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Cho, Eun Jung (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Park, Jung Yeon (Department of Clinical Pathology, Jinju Health College) ;
  • Sohn, Sea Hwan (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology)
  • 박지애 (경남과학기술대학교 동물생명과학과) ;
  • 조은정 (경남과학기술대학교 동물생명과학과) ;
  • 박정연 (진주보건대학교 임상병리과) ;
  • 손시환 (경남과학기술대학교 동물생명과학과)
  • Received : 2016.12.29
  • Accepted : 2017.03.07
  • Published : 2017.03.31
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Abstract

The eggshell is an intricate and highly ordered structure composed of multiple layers and a calcified matrix. The eggshell is formed at the uterine segment of the chicken oviduct. In this study, histological changes in the uterine endometrium and the expression of the eggshell-related genes were investigated according to hen age. We analyzed the expression of eggshell protein-related genes, such as OCX-32, OCX-36, OC-17, OC-116, and eggshell-ion-related genes, such as CABL-1, SPP1, SCNN1G, ATP2A2, CA2, and CALM1. In chicken uterine endometrium, histological deformation, fibrosis, atrophy and elimination of micro-villi were found with increasing hen age. The concentration of blood-ion components did not significantly change with age. The amount of telomeric DNA in uterine endometrial cells decreased with increasing hen age. The expression of most of the eggshell-related genes changed significantly with increasing hen age. The expression of some ovo-proteins, which play a role in eggshell formation, increased with increasing hen age; however, there were no significant correlations among eggshell protein genes. Eggshell ion-related genes, such as ATP2A2, SCNN1G, CA2, and CALM1, were closely related to each other. The OCX-32 and OCX-36 genes were closely related to some of the eggshell ion genes. Eggshell protein-related genes, such as the OCX-32, OCX-36 genes and ion-related genes such as CALB-1, ATP2A2, SCNN1G, CA2, CALM1, affected eggshell formation, mutually or independently. This study shows that, uterine although endometrial cell damage occurs with increasing hen age, normal eggshells can be formed in old hens. This suggests that eggshell protein-and eggshell ion-related genes also control the homeostasis of eggshell formation.

계란의 난각은 닭의 자궁에서 형성되는 복잡하고 고도화된 다층 석회화 구조이다. 본 연구는 닭의 산란연령에 따른 자궁내막조직의 변화 양상과 난각 형성에 관여하는 주요 유전자들의 발현 양상을 고찰하였다. 난각 형성과 관련하여 난각 단백질과 관련한 OCX-32, OCX-36, OC-17, OC-116 유전자와 난각 이온과 관련한 CALB1, SPP1, SCNN1G, ATP2A2, CA2, CALM1 유전자를 분석대상으로 하였다. 자궁내막조직의 현미경적 관찰 결과, 연령이 증가함에 따라, 자궁 섬모상피세포의 탈락 및 세포의 위축과 섬유화 진행양상이 심화되었다. 그러나 연령 증가에 따른 혈중 이온성분의 농도차이는 없었다. 자궁내막 상피세포의 텔로미어 함량 분석 결과, 산란연령이 증가함에 따라 텔로미어 함유율이 감소됨을 확인하였다. 대부분의 난각 형성 관련 유전자의 발현량은 산란연령에 따라 유의한 변화를 나타내었다. 일부 난각 단백질 관련 유전자의 발현량은 산란연령이 증가함에 따라 증가양상을 보였으나, 이들 유전자들 간의 상호 관련성은 유의한 관계를 보이지 않았다. 난각 형성 이온 관련 유전자인 ATP2A2, SCNN1G, CA2, CALM1 유전자 간에는 상호 밀접한 관련이 있는 것으로 나타났다. 또한 난각 단백질 관련 OCX-32 및 OCX-36 유전자는 대부분의 이온 관련 유전자들과 높은 정의 상관을 보였다. 따라서 OCX-32, OCX-36, CALB-1, ATP2A2, SCNN1G, CA2 및 CALM1유전자들이 난각 형성에 상호 협력하거나 또는 독립적으로 작용한다. 결론적으로 산란연령이 증가함에 따라 자궁내막세포의 손상이 일어나지만, 그럼에도 불구하고 정상적인 난각을 형성할 수 있는 이유는 난각 단백질 및 난각 형성 이온 관련 일부 유전자들이 발현을 조절하여 난각 형성의 항상성 유지하기 때문인 것으로 사료된다.

Keywords

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